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Ameren Missouri, a subsidiary of Ameren Corporation, has issued $500 million principal amount of 5.75% First Mortgage Bonds due 2056. The bonds were sold under an existing shelf registration on Form S-3 and a June 15, 2026 prospectus supplement.
Ameren Missouri received approximately $492.2 million in net proceeds from the transaction, before expenses. The report primarily provides the underwriting agreement and related documents as exhibits connected to this long-term financing.
Ameren Missouri, the electric utility operated by Union Electric Company, has asked the Missouri Public Service Commission for approval to increase its annual electric service revenues by $343 million. The request is built on a 10.25% return on common equity, a capital structure with 52% common equity, and a $16.7 billion rate base using a test year ended March 31, 2026, adjusted through an anticipated true-up date of December 31, 2026.
The company also seeks continued use of several regulatory mechanisms, including a fuel adjustment clause and trackers for pension and postretirement benefits, certain excess deferred income taxes, and production and investment tax credits or sale proceeds of such credits. The regulatory proceeding may run up to 11 months, with a commission decision expected by May 2027 and new rates effective by June 2027, but the company notes it cannot predict the level or structure of any eventual rate change.
Union Electric Company provided a definitive information statement calling a virtual Annual Meeting of shareholders for May 14, 2026 to elect five directors and conduct other business. Shareholders of record as of March 16, 2026 may vote; Ameren, which owns all outstanding common shares, intends to vote its shares for the director nominees.
The statement discloses governance arrangements with Ameren’s board performing committee functions for the company, stock ownership and related‑person policies, and executive compensation outcomes for 2025, including a 2025 short‑term incentive program payout above target and long‑term PSU results tied to TSR and Energy Transition metrics.
Ameren Missouri, a subsidiary of Ameren Corporation, sold $450 million principal amount of 4.80% First Mortgage Bonds due 2036 and $450 million principal amount of 5.55% First Mortgage Bonds due 2056. The bonds were issued under an existing shelf registration and related prospectus.
Ameren Missouri received aggregate net offering proceeds of approximately $891.1 million, before expenses, when the transaction closed. The report also lists the underwriting agreement, supplemental indenture, and legal opinions related to the bond issuance as exhibits.